Effects of Soil Properties on K Factor in the Granite and Limestone Regions of China
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Soil Sampling
2.3. Soil Analysis
2.4. K Factor Estimation
2.5. Statistical Analysis
3. Results
3.1. Comparative Soil Properties in the Soils of the JRC and CC
3.2. Comparative K Factor in the Soils of the JRC and CC
3.3. Effects of Soil Properties on K Factor in the Soils of the JRC and CC
4. Discussion
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Jiulongjiang River Catchment (JRC) | Chenqi Catchment (CC) | |
---|---|---|
Latitude | 24°13′53″–25°53′38″ N | 26°15′09″–26°15′56″ N |
Longitude | 116°46′55″–118°02′17″ E | 105°43′30″–105°44′42″ E |
Altitude | <200 m | 1300–1550 m |
Area | 14,741 km2 | 1.54 km2 |
Climate | Subtropical oceanic monsoon climate; MAT: 21 °C, MAP: 1400–1800 mm | Subtropical monsoonal climate; MAT: 15 °C, MAP: 1315 mm |
Lithology | Granite, sandstone | Limestone |
Soil type | Lateritic red soil, red soil, yellow soil, paddy soil, and purple soil | Limestone soil |
Land use | Forest land: 77.8%, including coniferous forest, evergreen broad-leaf forest, and subtropical rain forest; agricultural land: 6.8% | Secondary forest land and shrub land: 45%; agricultural land: 50% |
Soil Profile | Profile Depth (m) | Sample Interval (cm) | Total Sample | |
---|---|---|---|---|
JRC | 3 | YS: 6.0; LRS: 5.5; RS: 3.5 | 5 cm | 297 |
CC a | 18 | 0.3–0.8 | 0–30 cm: 10 cm; >30 cm: 20 cm | 83 |
Soil Properties | Jiulongjiang River Catchment (JRC) | Chenqi Catchment (CC) | ||||
---|---|---|---|---|---|---|
PC1 | PC2 | PC3 | PC1 | PC2 | PC3 | |
Clay | 0.43 | 0.13 | 0.84 | −0.60 | 0.74 | −0.28 |
Silt | 0.91 | −0.06 | −0.28 | 0.54 | −0.82 | 0.17 |
Sand | −0.96 | −0.03 | −0.28 | 0.21 | 0.55 | 0.59 |
SOC | −0.13 | 0.86 | 0.15 | 0.93 | 0.25 | −0.06 |
SON | 0.22 | 0.90 | −0.07 | 0.94 | 0.28 | −0.01 |
Soil pH | −0.31 | −0.57 | 0.47 | −0.26 | 0.11 | 0.82 |
K factor | 0.92 | −0.32 | −0.21 | −0.81 | −0.38 | 0.13 |
Eigenvalues | 2.92 | 1.99 | 1.16 | 3.15 | 1.82 | 1.16 |
Variance (%) | 41.75 | 28.43 | 16.57 | 45.06 | 25.98 | 16.53 |
Cumulative (%) | 41.75 | 70.18 | 86.75 | 45.06 | 71.04 | 87.57 |
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Liu, M.; Han, G.; Li, X.; Zhang, S.; Zhou, W.; Zhang, Q. Effects of Soil Properties on K Factor in the Granite and Limestone Regions of China. Int. J. Environ. Res. Public Health 2020, 17, 801. https://doi.org/10.3390/ijerph17030801
Liu M, Han G, Li X, Zhang S, Zhou W, Zhang Q. Effects of Soil Properties on K Factor in the Granite and Limestone Regions of China. International Journal of Environmental Research and Public Health. 2020; 17(3):801. https://doi.org/10.3390/ijerph17030801
Chicago/Turabian StyleLiu, Man, Guilin Han, Xiaoqiang Li, Shitong Zhang, Wenxiang Zhou, and Qian Zhang. 2020. "Effects of Soil Properties on K Factor in the Granite and Limestone Regions of China" International Journal of Environmental Research and Public Health 17, no. 3: 801. https://doi.org/10.3390/ijerph17030801